A class to communicate a USB dac (send:only 48kHz,16bit,2ch , receive:only 48kHz,16bit,1ch). Need "USBHost_AddIso" library.
Dependents: USBHostDac_Audio_in_out
Fork of USBHostDac by
Diff: USBHostDac.h
- Revision:
- 0:3a3146f89bcc
- Child:
- 1:9ff4cba6524d
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/USBHostDac.h Wed Apr 01 10:29:31 2015 +0000 @@ -0,0 +1,98 @@ +/******************************************************************************* +* DISCLAIMER +* This software is supplied by Renesas Electronics Corporation and is only +* intended for use with Renesas products. No other uses are authorized. This +* software is owned by Renesas Electronics Corporation and is protected under +* all applicable laws, including copyright laws. +* THIS SOFTWARE IS PROVIDED "AS IS" AND RENESAS MAKES NO WARRANTIES REGARDING +* THIS SOFTWARE, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING BUT NOT +* LIMITED TO WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE +* AND NON-INFRINGEMENT. ALL SUCH WARRANTIES ARE EXPRESSLY DISCLAIMED. +* TO THE MAXIMUM EXTENT PERMITTED NOT PROHIBITED BY LAW, NEITHER RENESAS +* ELECTRONICS CORPORATION NOR ANY OF ITS AFFILIATED COMPANIES SHALL BE LIABLE +* FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR +* ANY REASON RELATED TO THIS SOFTWARE, EVEN IF RENESAS OR ITS AFFILIATES HAVE +* BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. +* Renesas reserves the right, without notice, to make changes to this software +* and to discontinue the availability of this software. By using this software, +* you agree to the additional terms and conditions found by accessing the +* following link: +* http://www.renesas.com/disclaimer +* Copyright (C) 2015 Renesas Electronics Corporation. All rights reserved. +*******************************************************************************/ + +#ifndef USBHOSTAUDIO_H +#define USBHOSTAUDIO_H + +#include "USBHostConf.h" +#include "USBHost.h" +#include "USBIsochronous.h" + +#define USBDAC_DATA_SIZE (192 * 8) + +/** + * A class to communicate a USB dac (only 48kHz,16bit,2ch) + */ +class USBHostDac : public IUSBEnumerator { +public: + + /** + * Constructor + */ + USBHostDac(); + + /** + * Try to connect a audio device + * + * @return true if connection was successful + */ + bool connect(); + + /** + * Check if a audio is connected + * + * @returns true if a audio is connected + */ + bool connected(); + + /** + * Data send : It's sent by the 1536byte unit. + * + * @param buf pointer on a buffer which will be written + * @param len length of the transfer + * @param flush if true, less than 1536 bytes of data is sent + * + * @returns the number of bytes written is returned + */ + uint32_t send(uint8_t* buf, uint32_t len, bool flush = true); + +protected: + //From IUSBEnumerator + virtual void setVidPid(uint16_t vid, uint16_t pid); + virtual bool parseInterface(uint8_t intf_nb, uint8_t intf_class, uint8_t intf_subclass, uint8_t intf_protocol); //Must return true if the interface should be parsed + virtual bool useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir); //Must return true if the endpoint will be used + +private: + USBHost * host; + USBDeviceConnected * dev; + + bool dev_connected; + bool audio_device_found; + int audio_intf; + int audio_intf_cnt; + + IsochronousEp* m_isoEp; + uint16_t wMaxPacketSize; + uint8_t bEndpointAddress; + uint8_t bInterfaceNumber; + uint8_t bAlternateSetting; + uint8_t* p_rest_data; + uint32_t rest_data_index; + + void init(); + void onDisconnect(); + bool chkAudioStreaming(); + USB_TYPE setInterface(uint16_t alt, uint16_t index); + void setSamplingRate(uint32_t sampling_rate); +}; +#endif